Boiler.



No. 737,517. r Y PATBNTED AUG; '25, 1903.

\ F. E. STANLEY.

BOILER.

APPLICATION FILED JUNE 21, 1901. No MODEL.

` ggg @Moulay 4e v `in eontaet under ith Fig. 2, a section showing theparts in the posi tions which they occupy before being bound together toform shelland head -and with, a reinforcing shell or sleeve, and Fig. 3a modification.

1 seeureatigltyjoin f. sulting from anyfje s" fring l) "is a`Acontinuous'zring,z f which is smallerindanieter eter oftheparts'toiwhiclil@ .thisringis 4then lieaitdftoa, red heat and' isthereby expanded tosuehan can-be slipped over theexterorof the body i.theedgefef' theheamand the .ring "is then ton, in the county ofMiddlesex and State of Massachusetts, useful Improvements in Boilers, ofwhich the following-is a specification. A

and has for its objects erly strengthen the body of the boiler when itismade of soft metal, and ,to these ends I construct the parts as s etforth hereinafter ings, in whichlar steam-generator UNITED STATESPatented Agust .25, 190s.

nijnNr erica e HALFTC FREELAN o. STANLEY,

for NnwroN, MASSACHUSETTS.

.soiree `SIPEGIIIEICATION forming part of Letters Patent-No. 737,517,dated August 2 5, i903.

applicati@ nea nu@ 21.1901.

To all whom .it may concern:

Be it known that I, FRANCIS E. STANLEY, a citizen of the United States,residing at Newhave invented certain new and My invention relates tosteam-generators, to secure a tight joint between the head or heads andshell of the boiler withoutthe use of rivets and to propand asillustrated in the accompanying draw- Figure 1 is a sectional elevationof a tubuembodying my invention;

a tight joint between the sectionillustrating a The shell A of thesteam-generator may be of any suitable metal or composition, but isrecess inY and then by means` e 4necessary pressure' to fd toavoidleakage rexpansion of the parte, :the

the; opening in 1ra-iii;tl'iediam-- s applied, and

(extent 'that it or Shell of the boiler to a position oppositey 4thesteel head,

land the .setting the edge of "sired internal pressure, reinforcing theshell where it/-isnot desirable i ,to mairie use Serie-1 No- 35,474. (Nomodel.)

cooled or allowed to cool, when it will conwith theledge of the headandsecure and maintain the desired tight joint. The heating of theboilerwill not result in any undue expansion of the ring D, inasmuch as thelatter is in any case subjected to very much less heat than the otherparts.

In the head B, preferably of steel, is slightly rounded at the edge, andin the process of manufacture the shell is expanded near the end to formasljght shoulder or offset az, upon which the head is placed. copperproperly annealed the Shouldermay be readily formed. The ring D,preferably of steel and having an internal dialnetr'less than that ofthe outside shelhis provided with an annular groove "g, in its` innerface and may readily construction shown in "Figa 1 the A 7; be expandedby heat to a dialneter permittingit to be slipped into place out` sideof the shell, andwheniteeele'wll contract and foreethef-eepprshell up'against inching it between its inner face and the e `perfectly-tightsteamjoint.

In theeonstruction shown in" Fig. '3 the po? i sition' of the partsis-reversed, the ring -D having an ,annnlarrib won `the inner faceinwardly-,curved edgey'. f"

; If any' leaks shonldfappearwhen pressure is put upon. the j'generater,b of the f .shell projecting-beyendte head 'of the boiler may`be hammered; so as to. upset and close, 4the leak- Astheshelland headofthe boiler "are subjected toa -a higher?teinperwt ure than .thejoint'willbetightest when the steam-'presgreater heat-'and acquiretheoutside ring,

sure is greatest\.` i

ge'of the head andmaking a Y .head B having an annular recess or Itwillbe seenthat forv the purpose of up:V

joint `when necessarygit is desirable-that the shell shouldbe of softgruetal. AIn such case itmay be Ysoft of of a wire winding I provide 'areinforcingshell E,

of steel of proper thickness the shell to tighten the itself to standthedei andas 'one meansiof i .IDO

and somewhat lessin internal diameter than 65 I With a shell made'o jthe shell A, and expand this shellE by heat and slip it over the shell Abefore forming the shoulder upon the latter. 0n shrinking, the shell Econtracts and binds tightly against the shell A and aiords the desiredreinforcement.

Without limiting myself to the precise construction and arrangement ofparts shown, I claim as my inventionl. The combination in asteam-generator, of a shell, a head, and a ring engaging the outerportion of the shell with its inner face ata point opposite the edge ofthe head .and holding' the shell and head in contact to form a tightjoint, substantially as set forth.'

2. The combination in a steam-generator, ot' a shell and a head, onewith an annular recess to receive an annular projection on the other,and a shrunken ring having an inner face adapted to the outer face ofthe shell opposite'the edge of the head, holding` the parts 'togetherunder the pressure secured by shrinking, substantially as set forth.

A boiler in which the shell held in tight contact with the edge oi thehead by an external rin g under pressure, substantially as set forth.

4. The combination in a steam-generator, of a shell of soft metal, ahead the edge of which fits an internal annular recess in the shell, anda metallic ring recessed to fit the exterior of the shell opposite theedge of the head and maintained thereon under the pressure secured byshrinking, substantially as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

' FRANCIS E. STANLEY.

Witnesses:

J. W. BACON, J. H. GILKEY;

